大数加法 java A - A + B Problem II

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本文介绍了一个简单的编程问题——计算两个非常大的整数的和。输入包含多个测试案例，每个案例由两个大整数组成，需要使用Java的BigInteger类来避免溢出问题，确保计算的准确性。文章提供了一个完整的Java程序示例，展示了如何读取输入并正确输出结果。

I have a very simple problem for you. Given two integers A and B, your job is to calculate the Sum of A + B.

Input The first line of the input contains an integer T(1<=T<=20) which means the number of test cases. Then T lines follow, each line consists of two positive integers, A and B. Notice that the integers are very large, that means you should not process them by using 32-bit integer. You may assume the length of each integer will not exceed 1000.
Output For each test case, you should output two lines. The first line is "Case #:", # means the number of the test case. The second line is the an equation "A + B = Sum", Sum means the result of A + B. Note there are some spaces int the equation. Output a blank line between two test cases.
Sample Input

2
1 2
112233445566778899 998877665544332211

import java.math.*;
import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int t=in.nextInt();
for(int i=1;i<=t;i++)
{
if(i!=1)
System.out.println();
BigInteger a=in.nextBigInteger();
BigInteger b=in.nextBigInteger();
System.out.println("Case "+i+":");
System.out.println(a+" + "+b+" = "+a.add(b));
}
}
}